by Le Xav’.
Appeals court strikes down another generic biotech patent
[Via Ars Technica]
Last week, the full US Appeals Court for the Federal Circuit upheld an earlier ruling by a partial panel, invalidating a biotech patent that originated in research at MIT and Harvard. The patent covered any of three ways to disable a signaling pathway involved in the immune response, and would have enabled its licensee, Ariad Pharmaceuticals, to go after companies that already have drugs on the market. The court held, however, that simply specifying different ways of interfering with a protein without any written description of how to do so constituted insufficient grounds for granting a patent.
This case, and a similar one (University of Rochester v. Pharmacia) that served as precedent, both followed a similar pattern. In each case, basic research in a university context identified a key protein involved in inflammatory responses. For Rochester, it was the enzyme Cox-2; drugs that inhibit it included Celebrex and Vioxx, both painkillers with lower risk of stomach irritation than aspirin. In the new case, it was the NF-kappaB signaling pathway, which is involved in the immune response to pathogens. Excessive activation of the NF-κB creates chronic inflammation. In this case, Eli Lilly had two drugs already on the market.
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Requiring biotech patent holders to actually describe how to, say, inhibit a pathway, with real details, could change the patent scenery tremendously. Currently, many patents are written with pretty weak descriptions of the “a small molecule inhibitor could be made.”
The appeals court said that is not enough and that there must be a real description of the inhibitor in order to hold the patent for that innovation. It used to be that being somewhat vague in a biotech patent extended its reach and provided more leverage. Now, not so much. If this court ruling stands.
While disruptive to some patents in the short run it should reward innovative drug development in the long run. Now it appears that the organization that actually produces the inhibitor will be rewarded rather than the group that simply said it could be done, without giving any details.

